Abstract: A soil decontamination method in which soil and rocks contaminated with hydrocarbons, but substantially free of hazardous materials, is processed at a stationary site. The soil is first stored in a lined storage pit, segregated by type and source. Rock and extraneous material, such as concrete, asphalt, plastic, metal and debris (such as wood, sticks and paper) are removed from the soil and segregated. The soil is first heated to about 260.degree. C. to 425.degree. C. to desorb, but not burn, any hydrocarbon from the soil. The cleaned soil and hydrocarbon-containing heating gas then pass into a separator which separates the heavier soil components from the heating gas and the fines. The heating gas and fines are then heated to a much higher temperature, such as 760.degree. C. to 900.degree. C., to combust the hydrocarbon to create combusted gas and fines. The combusted gas and fines pass are cooled and the fines are filtered out.